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The yellow giant star Sham or Alpha Sagittae is evolutionary in a gap of the Hertzsprung-Russell diagram, where it can't stay for long. It's exact state of evolution is unclear, for the most part it reminds of a Cepheid variable, but it doesn't pulsate.

Constellation: Sagitta
Distance: 475 light-years
Spectral class: G1
Visual magnitude: 4.37
Luminosity: 340 * Sun
Mass: 4 * Sun
Diameter: 20 * Sun

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Photo: ESO Online Digitized Sky Survey

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